Commit 2b714820 authored by Linus Torvalds's avatar Linus Torvalds
Browse files
Pull modules updates from Jessica Yu:
 "Code cleanups: more informative error messages and statically
  initialize init_free_wq to avoid a workqueue warning"

* tag 'modules-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  module: statically initialize init section freeing data
  module: Add more error message for failed kernel module loading
parents fc996db9 fdf09ab8
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+11 −12
Original line number Diff line number Diff line
@@ -92,8 +92,9 @@ EXPORT_SYMBOL_GPL(module_mutex);
static LIST_HEAD(modules);

/* Work queue for freeing init sections in success case */
static struct work_struct init_free_wq;
static struct llist_head init_free_list;
static void do_free_init(struct work_struct *w);
static DECLARE_WORK(init_free_wq, do_free_init);
static LLIST_HEAD(init_free_list);

#ifdef CONFIG_MODULES_TREE_LOOKUP

@@ -2097,9 +2098,12 @@ static int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
	int i;

	for (i = 0; i < hdr->e_shnum; i++) {
		if ((sechdrs[i].sh_flags & shf_wx) == shf_wx)
		if ((sechdrs[i].sh_flags & shf_wx) == shf_wx) {
			pr_err("%s: section %s (index %d) has invalid WRITE|EXEC flags\n",
				mod->name, secstrings + sechdrs[i].sh_name, i);
			return -ENOEXEC;
		}
	}

	return 0;
}
@@ -3591,14 +3595,6 @@ static void do_free_init(struct work_struct *w)
	}
}

static int __init modules_wq_init(void)
{
	INIT_WORK(&init_free_wq, do_free_init);
	init_llist_head(&init_free_list);
	return 0;
}
module_init(modules_wq_init);

/*
 * This is where the real work happens.
 *
@@ -3841,8 +3837,10 @@ static int load_module(struct load_info *info, const char __user *uargs,
	char *after_dashes;

	err = elf_header_check(info);
	if (err)
	if (err) {
		pr_err("Module has invalid ELF header\n");
		goto free_copy;
	}

	err = setup_load_info(info, flags);
	if (err)
@@ -3850,6 +3848,7 @@ static int load_module(struct load_info *info, const char __user *uargs,

	if (blacklisted(info->name)) {
		err = -EPERM;
		pr_err("Module %s is blacklisted\n", info->name);
		goto free_copy;
	}